This year, Alessandra Ambrosio joins a long list of supermodels, including Claudia Schiffer, Gisele Bündchen, and Tyra Banks, who have all donned the Victoria's Secret Fantasy Bra during the brand's annual runway show. "It's a big honor," she told ELLE.com. "Every year, it's different design. This bra, it's the Floral Fantasy Bra, and it was inspired by a garden with beautiful flowers." The $2.5 million bra, done by London Jewelers, took between 4 to 5 months to create—each of the 5,200 amethysts, sapphires, rubies, and diamonds were all hand-set in a trellis of rose and yellow gold. Catch the bra, and Ambrosio, in action when the show airs December 4 on CBS. Until then, get the details straight from Ambrosio, below.

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ELLE: How did you find out you're wearing the Fantasy Bra this year?

Alessandra Ambrosio: I was actually nursing my three-week-old baby when I got the call. I was thrilled, but I was a little bit worried because my boobs at the time were gigantic. I was like, 'How many diamonds are they going to need to cover all this?' But in the end, it all worked out, and here I am!

ELLE: Is the bra really heavy?

AA: Well, it's set on the Very Sexy Push-Up Bra, so it's comfortable. Last year in the show, I had to carry 50-pound wings on my back, so this is nothing compared to that. And when you have over 5,000 precious gems on your body, it feels pretty good.

ELLE: Are you doing anything special to prep this year that you haven't in the past? You were pregnant during last year's show!

AA: I know, I was trying to be as quiet as possible about the whole thing. But this year, I'm definitely working out my arms, trying to be very in shape up here [in her top half] because this is going to be featured the most [because of the Fantasy Bra]. I'm not used to that, I usually just work out my lower body and never really do anything for my arms.

ELLE: Do you have any Halloween plans?

AA: I'm not sure, I have this crazy schedule. I might have to go to Hawaii and then Brazil. But I'll be here in New York on the night of the 31st, so if I have the energy, I might go out with my friends.

ELLE: What about your son and daughter, are they going to dress up?

AA: My daughter wants to be a Midnight Fairy—it's this fairy, all in black, very pretty. And my son's going to be a little animal—a dragon, maybe, or a lion… I haven't figured it out.